I am having a hard time understanding when to use singular verb versus plural verb for questions of the kind
One of the (X) that (Y)
For a sentence like :-
One of the shirts that belongs to him was stolen.
If I understand the rules correctly, if there is a "that" in a sentence of type One of the (X) that (Y), the verb should be plural. So in the above case is belong the right word?
Belongs is what I thought was right here.
I am confident that was is the right word for the last phrase.
Can you please clarify when should a singular verb be used in the case above. I keep getting these One of questions wrong all the time.
Thanks!